Combined grain cleaner and elevator



Aug. 7, 1928.

D. W. DETWILER COMBINED GRAIN CLEANER AND ELEVATOR Filed July 25, 1925 Patented Aug. 7, 1928.

. U-NITEDSTATES PATENTOFFIC p DANIEL W. DETWILER, or RosuBUD, ALBERTA, CANADA, ASSIGNOR To WESTRN STEE PRODUCTS LIMITEn'OF WINNIPEG, CANADA, A CORPORATION.

COMBINED GRAIN CLEANER ANDnLEvATon* y Application iedguiy 2s,

grain cleaners and elevators, and is designed more especially to producean attachment for separators,whereby as the thrashed'small rgram 1s deliveredfrointhe cross conveyor at the bottom of the separator it will be elevated the proper height to be discharged into wagons, and as it is elevated recleaned to takeout all impurities smaller than the grain, such as weed seed, wild oats, et cetera. p

Tothis end, it veyor screw having a cylindrical screen vsecured on the periphery of the screw and set at a substantial angle to the horizontal so that asithe device is rotated at the proper speed, grain delivered into its lower end will be elevated by the screw action to the upper end where it is discharged, and during the elevation the impurities are brought `to the screen surface by gravity or the` cent Iugal action, and discharged through the screen.) which is preferably enclosed by an imperforate cylinder spaced therefrom so'that the impurities can be collected and delivered wherever desired.` i 1 To illustrate myv inventionv` I annex hereto a sheet of drawings in which the same ref-v' erence characters are used to designate identical parts in allthe vfigures, of which1 1 is a side elevation `ofa separator havingniy cleaning and elevating apparatus applied thereto, a portion of said apparatus beingr in section and otherwise broken away to show the details thereof; and

Figs. `2 and 3 are sections on the lines 2-2 and 3 3, respectively, of Fig. V1.

The separator' 10 may be of any ordinary construction, and, per se.y forms nopart of my invention, which is adapted primarily as an attachment thereto. In the Ypreferred form of separators, the thrashed grain` is delivered into a transverse trough l1 located beneath the machine andhavng the customary screw conveyor 12 rotating therein. The trough 11 preferably terminatesin a cy lindrical portion 13 extending through the side of the separator and extending into the horizontal cylindrical portion 111iv of a boot casting 15 which is suitablysecured to the 'framework ofthe separator. rIhe'main cylindrical portion lfof the boot is preferably set at an angle of say forty-live degrees, and, of course, has its bottom closed and forming theV bearing forthe lower end ofthe conconsists primarily of a con- 1925. "serial 1ro.A 45,5 e8- veyoi' `shaft 17, the upper end of whichv is` ypurnaled as will be subsequently described, Ihe upper end of the cylinder 16 has the radiallyy extending annular flange 18 connecting' `the cylindrical portion 16 with the enlarged cylindrical portion 19 in which is secured thelower end of the elongatedcylindrlcal casing 20. The upper end of this casing is closed by a head 21, which has the'- bearingv therein, for the upper end of the screw' conveyor shaft 17,`which has secured on its upper end theiniter rear 22 meshin witharcorrespondiner gear Q3 secured on tlf4 short shaft 24 journaled in a suitable bear-i ingnpreierably formed on the head or cap 21, and having the belt pulley 25 secured on it outer end and driven by the belt 25 from the `pulley which is connected to any suitable shaft in the separator so as'to rotate theconveyor shaftl'? at the properrate of speed,twhich rate will vary withlthe inl clination of the shaft 17, as itvill beobvious that for elevi ing purposes, the more nearly the apparatus is brought to a vertical posi.- tion the faster the shaft 17 must` revolve, and the less must be the pitch 'of the screw 28 of the conveyor shaft 17. w In some conditions, I prefer to have the casino;A Q0' extend vertically, as indicated in dotted lines, so that the appearance of the apparatus will morenearly approach that of the elevators now 1n use. A

The lower end ofthe conveyor screw cooperates closely lwith the interior oflthe cylindrical portionA 1G of the boot so as to elevate out of the boot the grain delivered thereiuto by the screw 12. Above the cylin. drical portion 1G, the screw 28 is surrounded with the screen 29 which may be of wire mesh construction, and which is preferably supported kby yhavingv the periphery of the screw 28 provided with the `flange 'portion 30 extending` therefrom substantially at right angles to` the body of the screw and parallel to the axis ofthe shaft 17, and on the outside of the cylindrical screcnQQ, I place a helical band 31V opposite the flange 30, .and secure the two togetherfwith the screen clamped securely between them" by the bolts or rivets lp'aseed therethrough at frequent intervals. To support the casing 20, I provide the cylindrical band or casing` surrounding the saine and having the extension 341 bolted to the'side of the separator, land to support` the lscreen properly,

I locate thereon at suitable intervals the rings 35, which cooperate with the antlfriction rollers 36, see Fig. 3, journaled 1n suitable lugs 37 secured on the interlor of the casing 20. At the upper end ot' the casing 20, I locate the plate 87a extending across the same at right angles, and having an aperture therein of the proper size to receive the ring 38 secured on the upper end of the cylindrical screen.` The plate 37 has a .portion thereon extending out through an aperture 39 in the casing, and having the sides 40 to form a spout which opens into the swinging cylindrical spout 41, supported from the upper end of the casing 2() by the chains 42, so that the clean grain can be carried through the spout 41 to the wagon or other receptacle into which it is to be delivered. there the apparatus is to be used in a vertical position, as shown 1n dotted lines, I will provide above the plate 37 another plate 43 which is set at an angle and will serve to force the grain, as it were, to one side so that it will be discharged from the spout 40 into the weighing apparatus 44 indicated in dotted lines in Fig. 1.

The operation ot my improved apparatus will be readily apparent. The rotation of the Shaft 17 with the lifting action of the screw conveyor Q8 carries the grain from the bottom of the boot up through the screen and delivers the same through the spout 40. As it travels upward, gravity and the centrifugal force will spread the grain over the surface of the screen and any impurities therein smaller than the grains will fall through the apertures of the screen and slide down the interior of the casing 20 until they reach the bottom where they pass out through the aperture 45 formed therein and into the spout 46 beneath which may be placed any desired receptacle.

IVhile I have shown and described my invention as embodied in the form which I at present consider best adapted to carry out its purposes, it will be understood that it is capable of modifications and that I do not desire to be limited in the interpretation of the following claims except as may be necessitated by the state of the prior art.

lVhat I claim as new and desire to secure by Letters Patent of the United States, is-

1. In a combined elevating and cleaning apparatus, the combination of a helical conveying screw set at a substantial angle to the horizontal, with a cylindrical screen secured on the periphery of the screw, and rotating therewith, means for rotating the screw and screen, means for delivering grain to the lower end of the screw, and a casing spaced away from the screen and surrounding it, and having an aperture therein at its lower end through which the screenings are discharged at a single point.

Q. In a combined elevating and cleaning apparatus, the combination with a horizontal conveyor screw and its casing, of a boot adapted to cooperate therewith and consisting ot a main cylindrical portion terminating at its top in an enlarged oil-set and a horizontal cylindrical portion into which the horizontal conveyor screw extends opening into the main portion, a cylindrical casing secured at its lower end in the oil'set, a cap for the top ot the casing, a screw conveyor shaft journaled in the bottom of the boot and in the cap, means for rotating the shaft, a conveyor helix secured to the shaft and having its lower end cooperating with the boot, and a cylindrical screen surrounding and secured to the helix above the boot.

3. In an apparatus of the class described, a combination with a boot having an aperture therein through which the grain is received and having a main cylindrical por tion in the bottom of which is a bearing, of a cylindrical easing secured at its lower end to the upper end of the cylindrical portion of the boot, a cap for the top of the casing, a screw conveyor shaft journaled in the bearing in the bottom ol the boot and in the cap, means for rotating the shaft, a conveyor helix secured to the shaft and having its lower end cooperating with the boot, a cylindrical screen surrounding and secured to the helix above the boot, a plate extending transversely of the casing toward the upper end thereof and through which plate the upper end of the conveyor helix extends, and a spout connected with an opening in the side of the casing above the plate.

4. In an apparatus of the class described, a combination with a boot having an aperture therein through which the grain is received and having a main cylindrical portion in the bottom of which is a bearing, ot a cylindrical casing secured at its lower end to the upper end of the cylindrical portion of the boot, a cap for the top of the easing, a screw conveyor shaft journaled in the bearing in the bottom of the boot and in the cap, means for rotating the shaft, a conveyor helix secured to the shaft and having its lower end cooperating with the boot, a cylindrical screen surrounding and sccured to the helix above the boot, a plate extending transversely of the casing toward the upper end thereof and through which plate the upper end of the conveyor helix extends, a spout connected with an opening in the side of the casing above the plate, and a second plate above the first and inclined relative thereto so as to force grain delivered thereagainst toward the spout.

5. In a combined elevating and cleaning apparatus, the combination of a helical conveying screw set at a substantial angle to the horizontal, with a cylindrical screen secured on the periphery of the screw and rotating therewith but terminating short of cylindrical portion with which the unscreened lower end o'f the screw co-operates, said boot having an opening thereinto for receiving the uncleaned grain, and a casing forming a continuation of the boot and surrounding the screened portion of the screw and spaced away from the screen, and having an aperture therein through which the 20 screenings are discharged.

In witness whereof, I have hereunto set my hand this 27 th day of June, 1925.

DANIEL lV. DETWILER. 

